CN109564146A - Portable air sampler - Google Patents

Portable air sampler Download PDF

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Publication number
CN109564146A
CN109564146A CN201780050010.8A CN201780050010A CN109564146A CN 109564146 A CN109564146 A CN 109564146A CN 201780050010 A CN201780050010 A CN 201780050010A CN 109564146 A CN109564146 A CN 109564146A
Authority
CN
China
Prior art keywords
air
flow rate
collection chamber
mass flowmenter
enclosure body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201780050010.8A
Other languages
Chinese (zh)
Inventor
内森·G·克歇尔
小亚瑟·L·韦尔卢塔托
杰弗里·库尔赤瓦拉
马克·A·菲利普斯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Veltek Associates Inc
Original Assignee
Veltek Associates Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US29/574,405 external-priority patent/USD877924S1/en
Application filed by Veltek Associates Inc filed Critical Veltek Associates Inc
Publication of CN109564146A publication Critical patent/CN109564146A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N1/2214—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2226—Sampling from a closed space, e.g. food package, head space
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2273—Atmospheric sampling
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/24—Suction devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N2001/2285—Details of probe structures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/24—Suction devices
    • G01N2001/245—Fans
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

Air sampling rig is to the air sampling in controlled environment.The device includes the enclosure body with top and side.Opening is located in the top of enclosure body.Component is kept to keep sampling apparatus and cavaera.Component is kept to be located in the top of enclosure body around opening.Collection chamber has top and bottom end, wherein top is attached to the top of enclosure body around opening, so that collection chamber is connected to open flow.Mass flowmenter has input unit and output section, and wherein input unit is attached to the bottom end of collection chamber and is in fluid communication with the bottom end of collection chamber.Air blower is located in inside collection chamber, and be configured to draw air through sampling apparatus, by being open, pass through collection chamber and pass through mass flowmenter.The flow rate that mass flowmenter detection passes through the air of mass flowmenter.Also, controller receives the flow rate detected, and the speed of the control air blower of the flow rate in response to detecting from mass flowmenter.If the flow rate detected is lower than desired flow rate, controller increases the speed of air blower, if the flow rate detected is higher than desired flow rate, controller reduces the speed of air blower.

Description

Portable air sampler
Relevant application
This be filed on August 15th, 2016 the 29/574th, No. 405 United States Design application continuity, and require It is filed in the priority of on August 15th, 2016 No. 62/375,274 provisional applications.The entire content of these applications is by drawing With being incorporated herein.
Technical field
The present invention relates to the device and method for collecting and analyzing the air sample in controlled indoor environment.Specifically Ground, the present invention relates to for collecting, handling and analyzing air sample and long-range monitoring, record and control sampling in toilet The device and method of device.
Background technique
The controlled ring in such as region with the cover and toilet established in manufacturing facility, research facilities and other facilities Border (being referred to as with " toilet ") is typically based on relative to the indoor static air pressure of atmospheric pressure and/or based on neighbouring clean Air pressure in the space of clean room is divided into two major classes.Positive air pressure chamber is maintained at absolute air pressure, the absolute air Pressure is greater than atmospheric pressure, greater than the air pressure in the space of neighbouring toilet or greater than atmospheric pressure and adjacent to toilet Both air pressures in space.Positive air pressure in this room, which passes through, is pumped to room for the air for being filtered and/or being adjusted It is interior and control air and flow out the room to provide.Heating, ventilation can usually be passed through for the proximity space of manufacturing facility or office Permit with air-conditioning (heating, ventilation, and air conditioning, HVAC) system or by being provided to environment Perhaps the opening of proximity space and atmospheric pressure balance is to be maintained at atmospheric pressure or close to atmospheric pressure.Thus, from positive pressure The air of toilet's outflow can be flowed towards the lower pressure in adjacent chamber or atmosphere.
When positive air pressure toilet is destroyed, simply by the presence of the air pollutants in toilet not to proximity space In it is artificial at potential unfavorable health effect, the air for flowing to proximity space or atmosphere is not usually problem.In general, wherein Manufacture or the indoor air of cleaning for carrying out electronics, aerospace hardware, optical system, military equipment and national defence correlative study can Including concentration, there are safety or airborne gas, steam and the particulate matters of health effect to human health or environment Matter.However, be not always in this way, since other operations in those industry can produce the pollutant higher than acceptable level, and And therefore, it is necessary to prevent it from escaping toilet in the case where no processing.
Negative air pressure chamber is maintained at absolute air pressure, which is less than atmospheric pressure, less than neighbouring Air pressure in the space of toilet or less than both air pressures in the space of atmospheric pressure and neighbouring toilet.Pass through Negative pressure is kept so that air pumped out the room than being pumped into room faster rate through filtering and/or air through adjusting. When worrying that the pollutant in room air may cause potential health threat to the human health in proximity space or environment, Commonly using negative pressure chamber.
Although having an impact to human health and environment, certain form of manufacture and research operation must be clean in positive air pressure It is carried out in clean room, controls standard to meet good manufacture and the Good Laboratory of laws and regulations requirement and industry use.For example, state and connection Nation's regulation, including by National Institute and health research institute (National Institute for Occupational Safety and Health, NIOSH) promulgate regulation, it may be necessary to use positive pressure toilet or negative pressure toilet.
Specifically, food and drug administration (the U.S.Food & Drug Administration, FDA) wants Progress drug production in the range of toilet is asked, toilet provides for the drug of the manufactured batch of production in hygienic conditions and tests Card and certification.
Various FDA regulations (Regulation) and standard also specify the air sampling used in toilet and/or sky The requirement of gas monitoring device, the cleannes of facility are proved or verified during some drugs production activity.Regulations also specify Electronic data record related with monitoring clean room air quality, accuracy, precision and record save.It is all to other industries Such as bio-technology industries, also there is similar requirement.
Many patents and it is disclosed application teach in toilet carry out air sampling and monitoring and for from The system that one or more air sampling rigs are monitored and controlled in central location, for example, the 9285th, No. 792, No. 9063040, No. 9046453 United States Patent (USP) and No. 2016/0061796 U.S. Patent Publication.
In addition, assignee Veltek Associates company provides portable sampling device shown in fig. 8.Such as figure Shown, air is sucked by cavaera 50, passes through agar medium plate 52, and pass through the opening 54 of cavaera frame bottom.? After hole 54, air is aspirated through big fan 56 and the discharge of the cell body by passing through electronic device and from 58 row of bottom Out.The device is configured to the constant fan speed operation proportional to desired flow rate.
Summary of the invention
Air sampling rig is to the air sampling in controlled environment.The device includes the shell sheet with top and side Body.Opening is located in the top of enclosure body.Component is kept to keep sampling apparatus and cavaera (atrium).Component is kept to surround Opening is located in the top of enclosure body.Collection chamber has top and bottom end, wherein top is attached to enclosure body around opening Top so that collection chamber is connected to open flow.Mass flowmenter has input unit and output section, wherein input unit connection To collection chamber bottom end and be in fluid communication with the bottom end of collection chamber.Air blower is located in inside collection chamber, and is configured to aspirate Air by sampling apparatus, by being open, pass through collection chamber and pass through mass flowmenter.Mass flowmenter detection passes through quality stream The flow rate of the air of meter.Also, controller receives the flow rate detected from mass flowmenter, and in response to detection The speed of the flow rate control air blower arrived.If the flow rate detected is lower than desired flow rate, controller Increase the speed of air blower, and if the flow rate detected is higher than desired flow rate, controller reduces air blast The speed of machine.
When the description below of reference combination attached drawing, these and other objects of the invention and its many are contemplated that Beneficial effect will become more easily apparent.
Detailed description of the invention
When considered in conjunction with the accompanying drawings, by reference to described in detail below, because the present invention and its many attendant advantages become It is best understood from, therefore will be easier to obtain that they are more completely understood, in the accompanying drawings:
Fig. 1 is exemplary embodiments of the present invention, shows the elevated bottom perspective external view of air sampling rig；
Fig. 2 is exemplary embodiments of the present invention, shows the internal view of air sampling rig；
Fig. 3 A is exemplary embodiments of the present invention, shows the internal view of the upper chamber of air sampling rig, Air is shown into the device；
Fig. 3 B is exemplary embodiments of the present invention, shows the internal view of the upper chamber of air sampling rig, Show air impact dielectric-slab；
Fig. 3 C is exemplary embodiments of the present invention, shows the internal view of the upper chamber of air sampling rig, Air is shown to move through fan, mass flowmenter and exit the device by ventilation slot；
Fig. 3 D is exemplary embodiments of the present invention, shows the internal view of the upper chamber of air sampling rig, Air is shown to move through fan, mass flowmenter and exit the device by exhaust outlet；
Fig. 4 A is exemplary embodiments of the present invention, shows the exterior perspective view at the top of air sampling rig；
Fig. 4 B is exemplary embodiments of the present invention, and the top outer for showing the decomposition of air sampling rig is three-dimensional Figure；
Fig. 5 is to maintain the exploded view of component；
Fig. 6 A is the top view of the device, shows cavaera and dielectric-slab in interior location and keeps component；
Fig. 6 B is the top view of the device, shows cavaera and dielectric-slab in external position and keeps component；
Fig. 7 A shows in a vertical position and is mounted on the device on tripod；
Fig. 7 B shows the device for being in a horizontal position and being mounted on tripod；And
Fig. 8 is traditional sampling device.
Specific embodiment
When describing the preferred embodiment of the present invention shown in the drawings, for the sake of clarity, specific term will be used. However, the present invention is not intended to be limited to the specific term so selected, and it will be understood that each specific term includes with similar Mode operates all technically equivalent ones to realize similar purpose.Several preferred realities of the invention are described for illustrative purpose Apply mode, it should be appreciated that the present invention can be implemented with the other forms specifically illustrated not in the drawings.
Fig. 1 is to Fig. 2 shows the illustrative embodiments of air sampling rig 100 of the invention.Device 100 is portable , therefore it can carry and be placed on each position in controlled environment.As used herein, " air " generally refers to appoint What and all gas, steam and particle, it is no intended to limit the invention to specific type.Air sampling rig 100 is especially suitable For testing the microscopic particles in toilet.Device 100 generally includes sampler housing unit and main body or shell 102.Sampling Device housing unit 110 can be any suitable device, such as lid.Being in the illustrated embodiment can sterilising microbe valve Room (Sterilizable Microbial Atrium, SMA) 110, this can 110 overwrite media of sterilising microbe cavaera (SMA) Plate 114, the dielectric-slab 114 carry out sampling to the particle in air stream and high pressure sterilization or can sterilize in other ways.Valve Dielectric-slab 114 is protected in room 110, but air is allowed to flow through cavaera 110 with contact medium plate 114.Cavaera 110 can pass through heat Or steam sterilization, and can high pressure sterilization.Sampling apparatus 100 is disposed for cleaning the environment of such as toilet.
Shell 102 is usually cylinder, and has upper body 120 and lower body 130.As best seen in figure 2, upper Body 120 limits the upper inner space 210 for accommodating blower assembly 500 or upper chamber 210 and lower body 130 limits and accommodates certain The lower inner space of a little electronic components 300 or lower chambers 250.Wall 125 or partition 125 separate upper chamber 210 with lower chambers 250 It opens.Entire main casing 102 is single integration component.Handle 80 (Fig. 2) be can provide with Portable belt mancarried device 100.As schemed Show, handle 80 can be connected to the bottom of lower case ontology 130 from the bottom of upper housing ontology 120.
Upper chamber 210 and lower chambers 250
Upper chamber 210 has top 212 (Fig. 4 A, Fig. 4 B), front (Fig. 4 A, Fig. 4 B), rear portion (Fig. 1) and connection front With the opposite side portion at rear portion.As best seen in Fig. 4 A, Fig. 4 B, the top 212 of upper chamber 210 is detachably coupled to cavaera 110.Fig. 1, Fig. 2 are returned to, elongated ventilation slot 121 and bracket 122 are located at the rear portion of upper chamber 210.Bracket 122 be receive screw with Bracket 122 is fastened to the elongated component of upper chamber 210.It is that bracket 122 can be elongated and device 100 is configured to allow for exist Horizontal and anti-locking apparatus 100 is kept unintentionally to roll or tilt to side when in essentially horizontal position.In addition, can fill The retention mechanism being such as open is arranged in the rear portion for setting 100, which is configured to tripod (Fig. 7 B) cooperation to allow sky Gas sampling apparatus 100 is stood with horizontal arrangement.Retention mechanism can be the threaded openings with the cooperation of the screw thread of tripod.
Lower chambers 250 have controller access panels 131, multiple vertical supporting members 132 and vertical tripod receiver 133 (Fig. 7 A).Access panels 131 provide the access to controller, and the access point for USB slot and/or battery can also be provided. Multiple vertical supporting members 132 are arranged along the bottom of air sampling rig 100, so that it is stable immediately in independent stations.It is perpendicular Support 132 can coat the high friction material just like rubber or similar synthetic polymer, 100 edge of air sampling rig is presented Surface sliding.Vertical tripod receiver 133 is configured to cooperate with tripod (not shown) to allow air sampling rig 100 With vertical configuration standing.In some embodiments, vertical tripod receiver 133 has screw thread, so that it will be screwed into three feet In frame.Therefore, device 100 can be positioned vertically on supporting member 132 or is screwed on tripod by receiver 133.Device 100 It can also be horizontally located on bracket 122 or be screwed on tripod by threaded receiver.
Keep component 400
Go to Fig. 4 B, receiving unit 400 or keep component 400 to be arranged at the top 212 of upper chamber (it is also sampling cartridge Set 100 top).Keep the installation of component 400 to the depressed section at top 212, which has side wall 218 and bottom. One or more protruding portions 113 are formed in side wall 218.As best shown in FIG. 5, component 400 is kept to be shown as with center Fixing component 430, top plate or discoid pieces 420 and bottom or bottom plate 402 and one or more fixtures 410.
Bottom plate 402 has one or more curved elongated grooves or foot passage 406, the elongated grooves or foot passage 406 are formed as the slit in bottom plate 402.Bottom plate 402 is fixed at the top 212 of shell 102.Top plate 420 has one or more A curved elongated grooves or top passageway 422, the elongated grooves or top passageway 422 are formed as the slit in top plate 420.Top Plate 420 can be rotated relative to bottom plate 402, wherein bottom plate 402 remains fixed to shell 102.It can be on the top surface of top plate 420 One or more handles 426 are set.Handle 426 is upwardly extended from the top surface of top plate 420, so that user can grasp or push handle One or more of hand 426 (being two in the embodiment of Fig. 5) is with rotating top plate 420.Each of top passageway 422 One corresponding in foot passage 406 is aligned and is overlapped；However, as best seen in Fig. 6 A, top passageway 422 relative to Foot passage 406 is being flipped up surely, to form the configuration of Longworth chuck.Channel 406, channel 422 are individually curved Arc, they are formed together helical rib.Optionally, small plastic bumper or silicon buffer can be set on fixture 410, this A little buffers clamp agar plate 114, so that plate 114 is compressed between fixture 410.Even if when device 100 is horizontal or is inverted, Agar plate 114 is also held in position in by compression.
Fixture 410 is located in each of corresponding top passageway 422 and foot passage 406.Fixture 410 have bottom and Perpendicular to the side that bottom is formed, to substantially form L shape.Peg or supporting member 412 extend outwardly from the bottom of fixture 410. Supporting member 412 has neck and forms the head of inverted T-shaped, wherein and the bottom that neck is substantially perpendicular to fixture 410 extends, with And head is substantially perpendicular to neck and is parallel to the bottom of fixture 410.The neck of supporting member 412 extends through top passageway 422 and pass through foot passage 406.The head of supporting member 412 is wider and is located at the bottom side of foot passage 406.This is by top plate 420 It is locked to bottom plate 402, and each fixture 410 is also locked to shell 102 and corresponding a pair of of foot passage 406 and top and is led to Road 422.However, it should be noted that the head of supporting member 412 do not need to be located at the opposite side portion of bottom plate 402 and need not lockplate 402, Plate 420.Alternatively, the head of supporting member 412 can just receive in foot passage 406 and not extend through foot passage 406, so that head can be slided in foot passage 406.
As shown, foot passage 406 and top passageway 422 are slightly extended outward from center, so that when fixture 410 is logical When left/right is slided in road 406, channel 422, fixture 410 is mobile toward and away from center.Each channel 406, channel 402 All have most interior position (near central opening 119) and outermost position (farthest from central opening 119).As fixture 410 exists It is moved in channel 406, channel 422, fixture 410 continues towards identical direction.That is, the side of fixture 410 towards center and It is substantially concentric (or parallel) with central opening 119.When top plate 420 rotates, all fixtures 410 are in their own channel It is mobile and equidistant with central opening 119 simultaneously together.This provides desired minimum diameter and maximum gauge for fixture 410. Referring to Fig. 6 A, show the fixture 410 at interior location, wherein fixture 410 be located at respective channel 406, channel 422 it is most interior Position.In fig. 6b, the fixture 410 at external position is shown, wherein fixture 410 is located at respective channel 406, channel 422 Outermost position.By rotating top plate 420 relative to bottom plate 402, fixture 410 moves between interior location and external position. In one embodiment, interior location can provide the diameter of 85mm and external position can provide the diameter of about 100mm, this It is the common-size of dielectric-slab.
Fixing component 430 has neck 432, wide head 434, and is ring-shaped to form central opening 436.Bottom plate 402 and top plate 420 respectively have corresponding central opening 404, central opening 424.Plate 402, plate 420 are circular, and in Heart opening 404, central opening 424 form annulus shape.Bottom centre's opening 404 can have internal screw thread.The neck of fixing component 430 Portion 432 can have external screw thread, to cooperate with thread center bottom opening 404.
Neck 432 extends through roof center opening 424 and is threadedly engaged with bottom plate central opening 404, thus will top Plate 420 is locked to bottom plate 402, but top plate 420 is allowed to rotate relative to bottom plate 402.However, fixing component 430 is sufficiently compressed The head of supporting member 412 between top plate 420 and bottom plate 402, to provide enough frictional force, so that fixture 410 is maintained at The position being set by the user, and clamp agar plate 114 and slided without being not intended in channel 406, channel 422, to be locked in Appropriate location.Fixing component 430 is flexible at ergonomics and taper inward is met, to promote air to flow into center In opening 119, wherein the central opening 119 extends through fixing component central opening 436, roof center opening 424 and bottom plate Central opening 404.
As further shown in Fig. 4 B, test or the sampling cartridge of such as Petri dish or gelose medium plate 114 are provided It sets, wherein the test or sampling apparatus have the tested media being included in.Dielectric-slab 114 is placed on the bottom of fixture 410 Portion.Dielectric-slab 114 is held in position in by fixture 410.Fixture 410 slides into/skids off in groove 406, groove 422, makes It obtains discoid pieces 114 snugly to cooperate between fixture 410, and will not be unintentionally detached from from fixture 410, such as work as device 100 when horizontally rotating.Dielectric-slab 114 can be for example including gelose medium, which is designed to capture the sky for entering device 100 Particle in gas.Then the particle of capture can be analyzed.
Thus, adjustable fixture 410 is configured to inwardly or outwardly slide along the diameter of the base portion of cavaera 110, to hold Receive the gelose medium plate 114 of different-diameter.Once diameter adjustment matches at the diameter with gelose medium plate 114, then it is adjusted The peg 414 of fixture 410 can be moved to latched position from unlocked position, thus fixed gelose medium plate 114.Peg 414 is fixed Position is at the outer edge for making them catch gelose medium plate 114.Peg 414 respectively has low-angle, when peg 414 is located at plate When at approximate diameter, which generates the inward force of the wall against gelose medium plate 114, thus fixed gelose medium plate 114. Thus, dielectric-slab 114 is press-fitted into fixture and is kept by peg 414.
Cavaera 110
Referring to fig. 2, Fig. 4 A, Fig. 4 B, cavaera 110 are detachably coupled to the top 212 of sampling apparatus 100, and with The direct air communication of upper chamber 210.Cavaera 110 has cover board 111, which has flat top and than fixture 410 Side that is wide, extending downwardly.Multiple openings 112 are formed in the top of cover board 111.Referring to Fig. 4 B, in the side of cover board 111 It is formed with one or more lock slots or locking channel 112.Side wall of each of the locking channel 112 with receiving portion 216 Corresponding protruding portion 113 on 218 is aligned.Locking channel 112 has vertical portion and horizontal component.
In order to which cavaera 110 is attached to shell 102, cavaera 110 is placed on the top of dielectric-slab 114 by user, So that protruding portion 113 enters the vertical portion of locking channel 112.Once protruding portion is fully received in the perpendicular of locking channel 112 In straight part, then the rotatable cavaera 110 of user, so that protruding portion 113 enters the horizontal component of locking channel 112, thus will Cavaera 110 is removably locked to main casing 102 (Fig. 4 A).Whole device 100 can be horizontally arranged and cavaera 110 will Continue the top 212 for being fixed to main casing 102.User can pass through torsion cavaera 110 and pull out to remove cavaera 110, so that protruding portion is skidded off along horizontal component, then pulled out from the vertical portion of locking channel 112.
Blower assembly 500
Referring to Fig. 2, blower assembly 500 is arranged in the upper chamber 210 of air sampling rig 100.Blower assembly 500 With blower casing 502 and fan 504.Blower casing 502 is the collection chamber for conveying air.Collection chamber 502 has at least One wall, and collection chamber 502 is that there are two the cylinders of the form of tubes of open end for tool in the embodiment of Fig. 2.Air blower Shell 502 can be single integrating device, or the multiple separation being linked together by flange 503, flange 505 is discrete Shell, wherein flange 503, flange 505 extend outwardly in the end of each respective housings.Thus, as shown, first shell The top flange 503 of body may be coupled to the top 112 of shell 102 and the base flange 503 of first shell may be coupled to second The top flange 505 of shell.The base flange 505 of second shell may be coupled to mass flow sensor or detector adapter. Optionally, gasket can be set between flange 503, flange 505 and corresponding connector, it is airtight close to provide between them Envelope, so that air will not be leaked out from collection chamber 502.Thus, collection chamber 502 has top and the bottom end opposite with top. The top of collection chamber 502 is attached to the top of shell 102 around central opening 119, so that collection chamber 502 and holding component 400 With 110 air communication of cavaera.The size of collection chamber 502 and the size of central opening 119 are essentially identical, and may be bigger. Thus, fan 504 attracts air directly to pass through cavaera 110 and keeps component 400 via central opening 119.
Fan 504 is located in collection chamber 502.Fan 504 has centre bearing bar and fan blade 506.Center-pole tool There is longitudinal axis, the longitudinal axis which is arranged essentially parallel to sampling apparatus 100 extends.Fan blade 506 is from center Bar extends outwardly, and is configured to aspirate downwards air by collection chamber 502 (in the embodiment of Fig. 2, when sampling apparatus 100 Standing or when standing upright).Upper chamber 210 is sized and shaped for accommodating and the agar of matching criteria size and shape Jie Electronic component in scutum 114 and bottom chamber 250.
Thus, blower assembly 500 is elongated, and has the longitudinal direction parallel with the longitudinal axis of sampling apparatus 100 Axis.Therefore, when sampling apparatus 100 is vertical (Fig. 7 A), blower assembly 500 (including fan 504 and collection chamber 502) Longitudinal axis be vertical, and when sampling apparatus 100 is horizontal (Fig. 7 B), the longitudinal axis of blower assembly 500 is Horizontal.Collection chamber 502 and fan 504 are smaller than dielectric-slab 114, and to generate the air stream for passing through cavaera 111, this is medium Plate 114 provides reliable test result.As shown, collection chamber 502 and fan 504 can be 114 size of dielectric-slab about Half, and be centered about relative to dielectric-slab 114.
Mass flowmenter 600
Mass flowmenter 600 is also positioned in upper chamber 210, and located immediately at the underface of blower assembly 500.Matter Measuring flowmeter has input unit 602 on top, has output section 604 in bottom end.Input unit 602 is attached to the bottom of collection chamber 502 Portion open end and with the unhinderedly air communication of collection chamber 502.Thus, mass flowmenter 600 directly receives and travels through collection The air stream of gas chamber 502.If the bottom end of collection chamber 502 is greater than the input unit 602 of mass flowmenter 600, optionally, such as scheme It is shown, it is possible to provide adapter 603 is to keep gas-tight seal between the bottom of collection chamber 502 and the input unit 602 of quality stream.
The measurement of mass flowmenter 600 enters sampling apparatus 100 by cavaera 110, shock dielectric-slab 114, passes through gas collection The rate of room 502 and the air stream into input unit 602.As soon as denier air leaves the output section 604 of mass flowmenter 600, It is left into upper chamber 210 and via the blow vent 121 in shell 102.
As shown, upper chamber 210 includes operator's display and/or control panel 302, blower assembly 500 and matter Measure flowmeter 600.Control panel 302 is electronic touch display, allows users to the operation of control sampling apparatus 100.Control Panel 302 processed is attached to shell 102, and optionally for example extends in upper chamber 210.However, control panel 302 and shell 102 form gas-tight seal and/or liquid-tight seal, so that air will not be leaked out from upper chamber 210.
Electronic component package 300
All other electronic component 300 (other than control panel 302, blower assembly 500 and mass flowmenter 600) It is included in lower chambers 250.This provides stability for sampling apparatus 100 and reduces the width of sampling apparatus 100/straight Diameter.Electronic component package 300 may include such as controller 304, power supply (battery) and motor 306.In some embodiments, it controls Device processed can be computer or such as processor or the processing unit of ASIC.Controller 304 operates fan 504, mass flowmenter 600 and control panel 302.Controller 304 from control panel 302 receive operator control signal, such as start and stop test, It is arranged test parameter (time, flow rate etc.).Controller 304 is shown also on control panel 302 about sampling apparatus 100 The information of operation, such as flow rate, testing time and remaining testing time.Controller 304 can also pass through rigid line or wireless parties Formula and remote-control device (controller 304 or personal computer, network or smart phone in such as other sampling apparatuses 100) are logical Letter.
Thus, controller 304 runs the fan 504 and mass flowmenter 600 of air sampling rig 100.Work as sampling process When beginning, system is attempted to generate desired flow rate.Mass flowmenter 600 will pass through the instantaneous flow rate of system constantly It reports to controller 304.Controller 304 assesses whether the flow rate measured is equal to desired flow rate (usually 1cfm).Difference between desired flow rate and the flow rate measured is known as error.If desired flowing speed Rate is greater than the flow rate measured, then controller 304 will increase the frequency that fan 504 rotates to generate higher flowing speed Rate.If desired flow rate is less than the flow rate measured, the frequency that controller 304 rotates reduction fan 504 Rate is to generate lesser flow rate.The process can continuously repeat (per second repeatedly or incessantly) or weigh at predetermined intervals It is multiple.The process of assessment system output and modification system input provides closed-loop control.304 use ratios of controller-Integrated Derivative (" PID ") control algolithm minimizes and keeps low systematic error.The control method is preferably used in air sampling rig 100, To adjust fan speed based on instantaneous flow rate.Therefore, controller 304 is based on the reality provided by mass flowmenter 600 When feed back, the speed of real-time control fan 504 is without postponing or man-machine interactively.
In an exemplary embodiment, IEEE 802.3 (wired), 802.11 (nothing of IEEE can be used in controller 304 Line) and IEEE 802.15.4 (for the wireless of bluetooth) physical and datalink standard via TCP/IP network of network and company It is connected to internet.In alternate embodiments, controller 304 can by network remote send and receive order.It, can by network It is adopted using the networked device and application of processing unit (smart phone, computer etc.) remotely to monitor and control air Sampling device 100.Air sampling rig 100 can also export event history to removable USB flash drive.Flash drive and USB connection terminal can be accessed by controller access panels 131 (Fig. 1), which is flat simultaneously Device 100 is supported on horizontal position.Event history includes sample event, calibration event and management event.In an embodiment party In formula, device 100 can be integrated with network and central processing unit, in order to be monitored and controlled from central location, such as the Institute in No. 9285,792, No. 9063040, No. 9046453 United States Patent (USP) and No. 2016/0061796 U.S. Patent Publication As showing.Thus these patents and the content of application are incorporated herein by reference.
Ventilation slot 121 and port adapter 650
Referring to Fig.1, elongated ventilation slot 121 is located in the bottom rear of upper housing ontology 120.Ventilation slot 121 can have perpendicular Straight component, the stay and shell 102 are integrally formed, to form multiple slots and provide safety.Optionally, it is possible to provide with it is logical The exhaust port adapter 650 that wind groove 121 cooperates.Adapter 650 has base portion 652 and nozzle 654.Base portion 652 has and leads to The identical shape of wind groove 121.Base portion 652 covers slot 121 in a gastight manner and couples with slot 121, passes through spray to prevent air from removing It is leaked out except mouth 654 from shell 102.Nozzle 654 is protruded outward from base portion 652, and is had and extended through nozzle 654 and base The central opening in portion 652.
The remote location outside air delivery to clean environment that pipe can be attached to nozzle 654 will be discharged.Therefore, come It is escaped and enter in pipe from the air of upper chamber 210 by nozzle 654.
Exhaust port adapter 650 is removably cooperated by being vented matching mechanism 656 with ventilation slot 121.Exhaust cooperation Mechanism 656 can be convex structure (spring biasing arm etc.), which slides into concavity ventilation slot 121 and and concavity Ventilation slot 121 couples and clamps vertical supporting member.Exhaust nozzle 654 is exemplarily illustrated as substantial cylindrical delivery nozzle, But it can be any shape for allowing tubular attachment.In some embodiments, exhaust nozzle 654 allows to use fixture Fixing pipe is simultaneously formed gas-tight seal.In other embodiments, the outside of exhaust nozzle 654 can be rib-shaped piece and be taper , it is gas-tight seal to allow pipe to be formed by backup.
In another alternate embodiments of the invention, ventilation slot 121 can be the opening in shell 102, and can mention For individual grid, which is fastened in slot 121 (such as by retention mechanism or frictional fit), and be can be removed and used Exhaust adapter 650 is replaced.
Therefore, ventilation opening or ventilation slot 121 and/or exhaust port adapter 650 allow air to pass through air sampling rig 100 to be withdrawn into external environment.The opening in cavaera 110 that air passes through 120 top of upper body enters, and passes through upper The ventilation slot 121 at 120 rear portion of body leaves.Ventilation slot 121 can be located at the bottom at 120 rear portion of upper body, pass through sampling cartridge to provide Set 100 direct and continuous air stream.
Operation-air stream
The operation of air sampling rig 100 is discussed now with reference to Fig. 2, Fig. 3 A to Fig. 3 D.It is surveyed when sampling is arranged in operator When trying parameter and pressing starting, or when previously positioned test is programmed to start (such as every 4 hours), operation starts.? It is operated at this point, controller 304 starts fan 504.As shown in the arrow for showing air stream 10 (Fig. 3 A), fan 504 via Cavaera opening 112 is drawn air into sampling apparatus 100, and as shown in air flow arrow 12 (Fig. 3 B), and suction air is worn Cross gelose medium plate 114.As shown in air flow arrow 14 (Fig. 3 C), air impact dielectric-slab 114 simultaneously passes through around plate 114, arrives (as shown in Figure 2, between the bottom and bottom 402 of the dielectric-slab 114 and bottom of dielectric-slab 114 and fixed structure below plate 114 There are spaces between the top of part 430), and by keeping the central opening 119 in component 400 to leave.
It should be noted that the speed for the air for entering system by each opening 112 is the speed and cavaera of fan 504 The diameter of opening 112 in 110 and the function of quantity.(air stream 12, figure when the region of 112 lower section of air enter opening 3B), air is redirected towards nearest vacuum source central opening 119.The inceptive direction and air stream 12 of air stream 10 (Fig. 3 A) The new direction of (Fig. 3 B) is almost vertical.When air is redirected, the particle that many in air fast moves is due to its inertia And it so cannot suddenly redirect.These particles substantially continue its inceptive direction and hit gelose medium plate 114, are situated between in agar Each particle is kept at scutum 114.The emphasis of the process can be divided later them by these particle accumulations in agar Analysis.The air of redirection is sucked the agar side for laterally outward passing through gelose medium plate 114, its edge is crossed, along its outer wall Outside is downward, and laterally inwardly passes through the bottom side of plate 114, until it is sucked out by central opening 119.
As shown in the arrow for air stream 16 (Fig. 3 C), once air stream travels through valve by central opening 119 When room 110 (air stream 10) and holding component 400 (air stream 14), enter the upper chamber 210 for being located at air sampling rig 100 In internal collection chamber 502.Air directly enters the open top end (air stream 14) of collection chamber 504 from central opening 119.Fan 504 push air through collection chamber 504 (air stream 16), until it leaves the open bottom end (air stream 18) of collection chamber 504.It is empty Gas continues through adapter 603 (if you are using) to the input unit 602 of mass flowmenter 600.Mass flowmenter 600 is continuous Ground measures the rate of air stream 18, and the surveyed air flow rate signal with surveyed air flow rate is supplied to control Device 304.Controller 304 will continuously read measuring signal and adjust the speed of fan 504, to consider that the air of measurement flows speed Any difference between rate and desired air flow rate.
As for air stream 20 arrow shown in, air stream continue through mass flowmenter 600 and by output section 604 from It opens.As shown in FIG. 3 C, air stream 20 is left mass flowmenter 600 and is entered in upper chamber 210.As upper chamber 210 becomes to add (relative to the environmental pressure) of pressure, air are expelled to the outside of device 100 by ventilation slot 121.Optional partition wall 125 prevents Air enters lower chambers 250, so that lower chambers 250 and electronic equipment 300 are not interfered with air stream.Since motor 306 is A part of fan component 504, therefore do not need to cool down.The air of discharge be arranged essentially parallel to air entrance be oriented away from sky Gas sampling apparatus 100, with the domestic laminar flow of retaining ring.It is discharged to sampling apparatus by the ventilation slot 121 at 210 rear portion of upper chamber 100 and shell 102 outside.In an alternative embodiment, collection chamber or pipe can connect the output section 604 of mass flowmenter 600 It is connected to ventilation slot 121.
As shown in the Alternative exemplary embodiment of Fig. 3 D, venting plug is replaceable or is attached to ventilation slot 121, makes to have leisure Air-flow 20 is discharged by port adapter 650.Pipe can be connected to the nozzle 654 of port adapter 650, to deliver the air to Remote location outside clean environment, it is ultimately processed or is discharged at the remote location.Thus, air travels through ventilation Slot 121 and/or port adapter 650 are simultaneously redirected in attached pipe.
It should be noted that sampling apparatus 100 and its various parts are shown as the shape for having substantial cylindrical.For example, cavaera 110, keeping component 400, top plate 420, bottom plate 402, dielectric-slab 114, fixing component 430 and blower assembly 212 is all cylinder Shape.It should be understood that the present invention is not required to be configured to cylinder or circular, but can mention within the spirit and scope of the present invention For other shapes.
Several geometry or relational terms are used in this specification, it is such as round, circular, taper, parallel, vertical, same The heart, arc and flat.In addition, using several directions or position terms etc. in this specification, such as top, bottom, it is left and right, Above and below, inside and outside.For the sake of these terms are used for the purpose of conveniently, consequently facilitating being based on embodiment shown in the drawings It is described.These terms are not intended to be limited to the present invention.Thus, it is recognized that can these geometry, relationship, direction or Description is of the invention in other ways in the case where position terms.In addition, geometry or relational terms may not be accurate.For example, wall may not It is precisely vertical or parallel each other, but still believe that be it is substantially vertical or parallel, this is because such as surface is coarse The tolerance etc. allowed in degree, manufacture.Also, can without departing from the spirit and scope of the present invention, it is other suitable to provide Geometry and relationship.
In addition, sampling apparatus 100 includes the operation of one or more processing units (such as controller 304).It should be noted that place Reason device can be any suitable device, processor, microprocessor, PC, tablet computer, smart phone etc..Processing dress Setting can be used in combination with other suitable components, display device (monitor, LED screen, digital screen etc.), memory or Storage device, input unit (touch screen, keyboard, such as mouse fixed-point apparatus), wireless module (for RF, bluetooth, it is infrared, WiFi, Zigbee etc.).Operation or the information by processing unit output are storable in hard disk drive, flash memory in processing unit On driver, CD ROM disk or any other data storage device appropriate, these devices can be positioned at processing unit or with Processing unit communication.Whole process is automatically carried out by processing unit, without any man-machine interactively.Therefore, unless otherwise Illustrate, otherwise the process substantially real-time can occur without any delay or manual action.
In this specification, term " substantially " and " about " meaning adds deduct 20%, more preferably adds deduct 10%, even more It is preferred that add deduct 5%, 2% is most preferably added deduct.
In this specification, embodiment is described in a manner of it can write out clear and concise specification, but It is that it is intended that and will be appreciated that embodiment can carry out not without departing from the spirit and scope of the present invention Same combination or separation.For example, it should be appreciated that all preferred features described herein are suitable for described herein of the invention All aspects.
Air sampling rig 100 is especially suitable for controlled environment.It can be as being suitble to the material system used in controlled environment At.However, sampling apparatus 100 can be used in other environment.
Foregoing description and attached drawing be considered as be only the principle of the present invention explanation.The present invention can be with various shape and size Configuration, and be not intended to and limited by preferred embodiment.Those skilled in the art will readily appreciate that many of the invention is answered With.Thus, it is undesirable to limit the invention to disclosed specific example or show and describe definitely structurally and operationally.On the contrary Ground, all suitable modifications and equivalent can be assumed that and fall within the scope of the present invention.

Claims (15)

1. the air sampling rig for being sampled to the air in controlled environment, comprising:
Enclosure body has top and side；
Opening, positioned at the top of the enclosure body；
Component is kept, is configured to keep sampling apparatus, the holding component is located in the enclosure body around the opening The top；
Collection chamber has top and bottom end, and the top is attached to the top of the enclosure body around described be open, from And the collection chamber is connected to the open flow；
Mass flowmenter has input unit and output section, and the input unit is attached to the bottom end of the collection chamber, and with institute The bottom end for stating collection chamber is in fluid communication；And
Air blower positioned at the inside of the collection chamber, and is configured to draw air through the sampling apparatus, be opened by described Mouth passes through the collection chamber, and passes through the mass flowmenter.
2. air sampling rig according to claim 1, the mass flowmenter detection passes through the mass flowmenter The flow rate of air.
3. air sampling rig according to claim 2 further includes processing unit, the processing unit is from the quality stream Meter receives the flow rate detected, and the speed of the air blower is controlled in response to the flow rate detected.
4. air sampling rig according to claim 3, wherein if the flow rate detected is lower than desired Flow rate, then the processing unit increases the speed of the air blower, and if the flow rate detected is higher than Desired flow rate, then the processing unit reduces the speed of the air blower.
5. air sampling rig according to any one of claim 1 to 4 further includes cavaera, the cavaera connection To the enclosure body, to surround the sampling apparatus.
6. air sampling rig according to claim 5, the cavaera have for by the cavaera releasedly It is locked to the locking mechanism of the enclosure body.
7. air sampling rig according to claim 5, there are the cavaera lock slots and the enclosure body to have There is protruding portion, the protruding portion is releasably engaged the lock slots, and the cavaera is releasedly locked to the shell Body ontology.
8. air sampling rig according to any one of claim 1 to 7, the holding component has one or more can For the fixture of adjusting to engage the sampling apparatus, adjustable fixture has interior location and external position, to engage not With the sampling apparatus of size.
9. air sampling rig according to any one of claim 1 to 8, the enclosure body has blow vent, will Air is discharged from the output section of the mass flowmenter.
10. air sampling rig according to claim 9 further includes blow vent adapter, the blow vent adapter is matched It being set to and removably couples with the blow vent, the blow vent adapter has nozzle, and the nozzle is configured to couple with pipe, Air is expelled to remote location via the pipe from the output section of the mass flowmenter.
11. air sampling rig according to any one of claim 1 to 10 further includes processing unit, the processing dress It sets and is configured to record sample event, calibration event and/or management event.
12. air sampling rig according to claim 11, the processing unit and remote network communication, and adopted described Sample event, calibration event and management event are communicated to the telecommunication network.
13. air sampling rig according to any one of claim 1 to 12, wherein the enclosure body and the collection Gas chamber is that the cylindrical and described opening is circular.
14. the method for being sampled to the air in controlled environment, comprising:
Start the air blower of the inside of shell, to draw air across the dielectric-slab for the outside for being located in the shell and by matter Measure flowmeter；
The flow rate of the air is detected at the mass flowmenter；And
In response to detected flow rate, the speed of the air blower is controlled at processing unit.
15. according to the method for claim 13, if the flow rate detected is lower than desired flow rate, The processing unit increases the speed of the air blower, and if the flow rate detected is higher than desired flowing speed Rate, then the processing unit reduces the speed of the air blower.
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US29/574,405 2016-08-15
US15/243,403 2016-08-22
US15/243,403 US10732081B2 (en) 2016-08-15 2016-08-22 Portable air sampler
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